Dark Mustard — Dark Mustard has the warm, muted yellow of prepared mustard, giving it its name. It belongs to the Yellow,Brown family: a dark, vivid tone with hex code #A88905 and RGB values of 168, 137, 5. Its dominant channel values give it a warm undertone that reads as vivid rather than flat. Dark Mustard pairs well with complementary tones from the opposite side of the color wheel and works nicely in packaging design. Nearest neighbors: gold, chestnut.